1. Arbuckle, J. (1986). Snags: Widowmakers or wildlife habitat? In J.A Bissonette (ed.), Is good forestry good wildlife management? Maine Agricultural Experiment Station Miscellaneous Publication No. 689. 377 pp.
2. 1995–96 NWOA position statements;Argow;Woodland Report,1995
3. Work injury report (WIR), injuries in the logging industry;Bureau of Labor Statistics,1984
4. Labor. Parts 1900 to 1920;Code of Federal Regulations,1988
5. Occupational Safety and Health Administration. 29 CFR, Parts 1910 and 1928. (Docket No. S-048). Logging operations.;Department of Labor,1994